Remote Assertion Vulnerability in Open5GS AMF/MME Functionality
CVE-2025-5520

6.9MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
3 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5520?

A vulnerability exists in Open5GS versions up to 2.7.3 within the gmm_state_authentication and emm_state_authentication functions of the AMF/MME components. This vulnerability enables remote attackers to manipulate the system, leading to reachable assertion vulnerabilities. The public disclosure of this exploit indicates a significant security concern that requires immediate attention. Applying the patch identified by the commit 9f5d133657850e6167231527514ee1364d37a884 is highly recommended to mitigate the risk associated with this vulnerability.

Affected Version(s)

Open5GS 2.7.0

Open5GS 2.7.1

Open5GS 2.7.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-5520 - Proof of Concept

References

https://vuldb.com/?id.310956
vdb-entrytechnical-description
https://vuldb.com/?ctiid.310956
signaturepermissions-required
https://vuldb.com/?submit.582269
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

SQ0409 (VulDB User)
.
CVE-2025-5520 : Remote Assertion Vulnerability in Open5GS AMF/MME Functionality